Color television camera optical system adjusting for chromatic aberration

Abstract

A color television camera for converting an image formed by an objective lens into video signals is contructed with inclusion of a prism for splitting light having passed through the objective lens into a plurality of color components, and a lens unit arranged in between the prism and at least one of a plurality of solid-state image pickup means and having such an optical power that the sizes of the images of all the color components are made coincident with one another.

What is claimed is: 
     
       1. A color television camera system comprising: an objective lens having chromatic aberrations;   splitting means for splitting light having passed through said objective lens into at least first and second color components;   first solid-state image pickup means for picking up a first image having said first color component;   second solid-state image pickup means for picking up a second image having said second color component; and   first light refracting means arranged in between said splitting means and said first solid-state image pickup means and having such an optical power that the size of said first image is made substantially coincident with the size of said second image.   
     
     
       2. A color television camera system according to claim 1, further comprising second light refracting means arranged in between said splitting means and said second solid-state image pickup means and having the same optical power as that of said first light refracting means, the distance between said first solid-state image pickup means and said first light refracting means being different from the distance between said second solid-state image pickup means and said second light refracting means. 
     
     
       3. A color television camera system according to claim 1, further comprising second light refracting means arranged in between said splitting means and said second solid-state image pickup means and having an optical power different from that of said first light refracting means. 
     
     
       4. A color television camera system according to claim 1, further comprising means for moving said first light refracting means along an optical axis. 
     
     
       5. A color television camera system according to claim 1, wherein said objective lens has a lens group movable for zooming, and further comprising detecting means for detecting the position of said lens group and means for moving said first light refracting means along an optical axis on the basis of an output of said detecting means. 
     
     
       6. A color television camera system according to claim 1, wherein said objective lens has a lens group movable for zooming, and further comprising detecting means for detecting the position of said lens group and means for varying the optical power of said first light refracting means on the basis of an output of said detecting means. 
     
     
       7. A color television camera system according to claim 1, satisfying the following condition: 3000 mm>|f|>200 mm where f is a focal length of said first light refracting means.     
     
     
       8. A color television camera for converting an image formed by an objective lens into video signals comprising: splitting means for splitting light having passed through said objective lens into a plurality of color components;   a plurality of solid-state image pickup means for picking up the respective images corresponding to said plurality of color components; and   first light refracting means arranged in between said splitting means and at least one of said plurality of solid-state image pickup means, and having such an optical power that the sizes of the images having the respective color components are made substantially coincident with one another.   
     
     
       9. A color television camera according to claim 8, further comprising second light refracting means arranged in between said splitting means and another of said plurality of solid-state image pickup means and having the same optical power as that of said first light refracting means, the distance between said first light refracting means and said one of said plurality of solid-state image pickup means differs from the distance between said second light refracting means and said other of said plurality of solid-state image pickup means. 
     
     
       10. A color television camera according to claim 8, further comprising means for moving said first light refracting means along an optical axis. 
     
     
       11. A color television camera according to claim 8, wherein said objective lens has a lens group movable for zooming, and further comprising detecting means for detecting the position of said lens group and means for moving said first light refracting means along an optical axis on the basis of an output of said detecting means. 
     
     
       12. A color television camera according to claim 8, wherein said objective lens has a lens group movable for zooming, and further comprising detecting means for detecting the position of said lens group and means for varying the optical power of said first light refracting means on the basis of an output of said detecting means. 
     
     
       13. A color television camera according to claim 8, satisfying the following condition: 3000 mm>|f|>200 mm where f is a focal length of said first light refracting means.     
     
     
       14. A color television camera for converting an image formed by an objective lens having chromatic aberrations into video signals, comprising: splitting means for splitting light having passed through said objective lens into first, second and third color components;   first, second and third image pickup means for picking up the respective images corresponding to said first, second and third color components;   first light refracting means arranged in between said splitting means and said first image pickup means and having such an optical power that the size of the image of said first color component substantially coincides with the size of the image of said third color component; and   second light refracting means arranged in between said splitting means and said second image pickup means and having such an optical power that the size of the image of said second color component substantially coincides with the size of the image of said third color component.   
     
     
       15. A color television camera according to claim 14, wherein said first light refracting means moves along an optical axis. 
     
     
       16. A color television camera according to claim 14, wherein said first, second and third image pickup means each are a solid-state image pickup element.